Process of manufacturing vehicle-tires.



J. HUEBNER.

PROCESS OF MANUFACTURING VEHICLE TIRES. APPLICATION FILED we. 26. '1910.

1,009,752. Patented Nov. 28, 1911.

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ED STATES PATENT o m JOHAYNIIHFFBNER, or CHICAGO, rumors.

PROCESS OF MANUFACTURING VEHICLE-TIRES.

Specification of Letters Patent.

To all whom it may concern 7 Be it known that I, JOHAN HuEBNnn, acitizen ofthe United States, and residing at Chicago, in the county ofCook and State of Illinois, have invented a new anduseful may beproduced which will be uniform in character and of'like resiliencythroughout; to provide a process of manufacturing vehicle tires having asponge rubber filling which will overcome any tendency toward unevennessin the spongy formation and produce a tire in which the road pressurewill be evenly distributed throughout the spongy mass; and to provide avery cheap, simple and durable tire, having a great amount of resiliencyand not likely to get out of repair.

A specific construction formed in accordance with this invention isillustrated in the accompanying drawings, in which:

Figure l is a transverse section of the tire filler partly formed, andenlarged for clearness of illustration. Fig. 2 is a side elevation ofthe completed filler ready to be placed in the outer casing. Fig. 3 is across section of the filler and outer casing, before vulcanization. Fig.4 is a cross section of the tire and vulcanizing mold or form, aftervulcanization of the tire. Fig. 5 is a perspective view of one of theattaching plates.

In carrying out the process, a sheet 1 of flexible material, such forinstance as canvas or other suitable fabric, is impregnated with arubber solution and is covered or coated on one side thereof with alayer of rubber compound 2. One edge of the rubber coated sheet is thenfolded into a plurality of folds to provide a central core 3, and thesheet is then wound around the core 3 in a spiral or convolute formuntil the filler is of sufficient diameter. During the winding thecoated sheet is parted or cutlongitudinally of the roll at a pluralityof points at, which are out of radial alinement with each other, and

the edges formed by each out are arranged closely-together. VVith thisconstruction the filler may expand during vulcanization without dangerof distorting the filler.

erably formed. of a combination of rubber and ammonium carbonate in theproportion of one part of the carbonate to twelve parts of rubber,though the proportion ma. be

varied according to the quality of the ru her". When the filler has beenformed to the" desired diameter its ends are cut slanting so as tooverlap, as shown at 5 in Fig. 2, and the filler is then placed. in anouter casing 6 of rubber which has been previously; formed to thedesired shape of the tire, and is open at 7 along itsinner=circumference:

Attaching plates 8, having internally thread- .ed studs or bosses 9 ononeside thereof, are placed in the casing 6 at suitable: distances apartand with the studs projecting into, the slot or opening 7, the sides ofwhich be cut away to receive the studs.

A strip 10 of rubber coated fabric or other: suitable material is thenplaced over the opening I to seal the same, and the casing is mounted ona ring 11 of a diameter to fit closely to the inner circumference of theeasing, and bolts 12 pass through said ring and .aresecuredto the studs9, thereby holding the edges of the casing together.

An annular vulcanizing mold or form 13 is divided into two parts in aplane at right Patented Nov.28, 1911., Application filed August 26,1910. Serial No. 579,050. 'l

The rubber. compound or coating 2is pref angles to its axis, and isadapted to fit closely over the casing and ring 11.

When the filler is laced in the casingit does not quite fill i; ecasing, but leaves spaces 14 therein into which the filler may expandduring vulcanization. When the casing is placed within the vulcanizingmold and heat is applied to the mold, the ammonia in the rubber coatingon the fabric causes the rubber to expand into a sponge like massbetween the layers of fabric and entirely fill the casing, and thelayers of the filler are vulcanized together and to the casing, therebyforming a unitary mass. The attaching plates are also firmly embedded inthe rubber and serve to attach the tire to the wheel.

It is immaterial. if'the rubber coating on the fabric does not expand inthe same degree at all points, since the sponge rubber is confinedbetween the layers of fabric which tend to transmit the pressure evenlythroughout the tire.

The tire thus formed will have an inner portion or filler comprising aplurality of convolutions of sponge rubber, separated by convolutions offabric. The parts or cuts 4 in the fabric permit the; filler to expandevenly throughout.

While I have sh and described but one specific method of carrying out myinvention, it will be understood 'that various details of the methoddescribed may be varied or omitted without departing from the scope ofthe claims.

I claim:

1. A process of manufacturin tires, comprising coating a sheet of fa ricwith a layer of material adapted to assumea cellular form upon theapplication of heat, forming the coated sheet into an annular rol1,-,

placing an outer casing on the roll, and applying heat to the structurethus formed to vulcanize the layers together and to-thecasing and formthe coating into a cellular mass.

2. A process of manufacturin tires, comprising coating a sheet of flexi1e material with an admixture of rubber and ammonia, winding the coatedsheet into a roll and bringing the ends of the roll together, plac-.

ing an outer casing of" rubber on the roll and vulcanizing the layers ofthe roll together and to the casing, thereby forming the coating intosponge rubber.

3. A process of manufacturing tires, comprising forming a filler ofaplurality of convolutions of flexible material coated with a layer ofrubber and ammonia, placing'an outeryr ubber casing on the filler, andheating the structure thus formed to convert the rubber coating intosponge rubber and vulcaniz'e the parts together.

4. A process of manufacturing tires, comprising coating a sheet offlexible material with a compound of rubber and armnonia, winding thesheet into a roll, and bringing the ends of the roll together, placingthe roll into an outer rubber casing, and placing the structure thusformed into a vul- 'convolutions of the roll together and to thecasingyand converting the rubber compound into sponge rubber. e

In witness whereof I have hereunto subscribed -my name. in the presenceof two witnesses.

J OHAN HUEBNER.- Witnesses:

CHAmsJ. MoHn', Josnr'n KING.

